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Sonification Sonification in Theoretical Physicsin Theoretical Physics
Katharina VogtProf. W. PlessasProf. R. Höldrich
Todtmoos, 12th september 2007
Oversound
• Bats• Doppler effect • Alarm • Geiger counter• Computer sounds• Sonar• Heart beat• Bells
Overview
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Motivation
• Science focused on visualisation
• Changes: – real time audio synthesis software– human audition– growing amounts of data
• Auditory Display:
possible alternative and complement
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Galilei
Doppler effect
Examples
• Galilei, Dopplereffekt• Discovery of Quantum Fluctuations• Plasma and Radio Wave Science• Listening to Earthquakes • Oscillations of yeast cells with AFM• EEG - data• Social Sciences
Example: Quantum Oscillations
Pereverzev S. V. , Loshak A., Backhaus S., Davies J.C. and Packard R. E., „Quantum Oscillations between two weakly coupled reservoirs of superfluid 3He“, Nature, Vol. 388, July 1997, pp. 449 – 451.
Josephson B. D. „Possible new effects of superconductive tunneling“, Phys. Lett. 1, 251 – 253, 1962.
f=(2-1)/h ... mean energy per particle
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Hz
Auditory Display / Sonfication
• 1992 - 1st International Conference on Auditory Display (ICAD)
• Sonification = use of audio to convey information• Applications:
– Auditory Graphs
– Attensons
– Earcons
– Auditory Icons
Methods in research
Audification:• mapped to 1-d• ev. transposed
Parameter mapping:
Model-based sonification
Advantages
Advantages
+ eyes-free conditions + high temporal and frequency resolution+ parallel audio streams+ the formation of auditory gestalt + backgrounding+ usually interactive
Furthermore in physics:+ many (parameter) dimensions + audio streams as mathematical subspaces+ wave phenomena in nature
Disadvantages
- low resolution in some variables- potentially the annoyance- no persistence - user limitations and cultural bias- longer history of visualisation- the lack of absolute value and perceptual
orthogonality
Aims of Sonification
1. Alternative representation of data
2. Use of audition in order to analyse scientific data
3. Artistic application
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Sonifications so far
SonEnvir - Sonification Environment (2005-2007)
• Spin models (Ising and Potts model)• Pilot project on topological objects in QCD• Baryon spectra of CQMs• Simple sonifications of the Dirac spectrum• Smaller projects: chaotic double pendulum,
logistic equation
Ising and Potts Model
Ising model:• spin up and down• phase transition
magnetic/ non-magnetic
Potts model:• discrete,• q vectors on unit circle• For q5 1st order phase transition• For q4 continuous€
H = −J SiS j(i, j )nn
∑ − h Sii
∑
Audification of the Ising model
Sequentialisation: (“torus-path” or Hilbert curve)
Parameter Mapping of Ising Model
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Sonification in lattice QCD - pilot study
topological charge20 configurations - 15 smearing steps€
Q =g2
16π 2d4xεμνρσ∫ Fμν Fρσ
Sonification in lattice QCD - pilot study
Motivation
Auditory Display and Sonification• Examples• Methods
Sonifications…• …of Numerical Spin Models• …in Lattice QCD
Outlook
Outlook
• XY-model
• Lattice QCD
Sonification is a possible alternative and complement to visualisation and data analysis, also in physics.
Audio examples:• http://sonenvir.at/data• www.icad.org
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